Answer:
y=8x+25
y=5x+12
Explanation:
To write a system of equations you must write an equation for both plan A and B. For plan A, the 25 dollars is the constant because it is only paid once. The 8 dollars must be multiplied by the variable x because it is paid each month. These added together will equal the total cost or y. In plan B the 12 dollars is the constant and 5 is being multiplied by the variable.